﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace NGUYENTHUTRANG.OOP.SAMPLE
{
    class Circle
    {
       private double dra = 1.0;
        public Circle()
        {

        }

        public Circle(double newdra)
        {
            dra = newdra;
        }
         public double Areas()
        {
            return dra * dra * Math.PI;
        }

         public double getdra { get { return dra; } set { dra = value;} }


    }
}
